计算:2001×20002000-2000×20012001=______.
计算:2001×20002000-2000×20012001=______.
计算:5002-499×501=______.
计算:1232-122×124=______.
计算:1001×1001-1001=______.
简便计算:101×99=______.
计算:888×999=______.
计算:lg2+lg5=______.
计算:1.996+19.97+199.8=______.
计算5.762-4.242=______.
计算:57.32°=______度______分______秒.
计算1+2-3+4+5-6+7+8-9+…+1999+2000-2001+2002+2003=______.
计算:1-3+5-7+9-11+…-1999+2001=______.